Crystal structure and Hirshfeld surface analysis of a new di­thio­glycoluril: 1,4-bis­(4-meth­oxy­phen­yl)-3a-methyl­tetra­hydro­imidazo[4,5-d]imidazole-2,5(1H,3H)-di­thione

In the title di­thio­glycoluril derivative, C(19)H(20)N(4)O(3)S(2), there is a difference in the torsion angles between the thio­imidazole moiety and the meth­oxy­phenyl groups on either side of the mol­ecule [C—N—C(ar)—C(ar) = 116.9 (2) and −86.1 (3)°, respectively]. The N—C—N bond angle on one side of the di­thio­glycoluril moiety is slightly smaller compared to that on the opposite side, [110.9 (2)° cf. 112.0 (2)°], probably as a result of the steric effect of the methyl group. In the crystal, N—H⋯S hydrogen bonds link adjacent mol­ecules to form chains propagating along the c-axis direction. The chains are linked by C—H⋯S hydrogen bonds, forming layers parallel to the bc plane. The layers are then linked by C—H⋯π inter­actions, leading to the formation of a three-dimensional supra­molecular network. Hirshfeld surface analysis and two-dimensional fingerprint plots were used to investigate the mol­ecular inter­actions in the crystal.